Double-acting reciprocating pump



Oct. 9, 1923.. 1,470,426

H. E. DANSTRUP DOUBLE ACTING 'RECIPROCATING PUMP Filed Oct. 11. 1922 2 Sheets-Sheet I Get. 9, 1923. 1,470,426

I H. E. DANSTRUP I DOUBLE ACTING RECIPROCATING PUMP Filed Oct. 11 1922 2 Sheets-Sheet 2 awucm boa 17am fia/mrap lugs 25 extended equidistantly about the member 12, and are passed freely through corresponding lugs 26 extended from memher 23; the ends of these bolts having adjustment nuts 27 which retain helical springs 28 that exert suitable tension against member 23, to thereby establish and maintain the operative relation of the valve elements.

It will be appreciated that by turning the nuts 27 the tension of springs 28 may be adjusted so as to permit proper freedom of rotation for member 18.

Packing rings 29, which may be of the lock character shown in Fig. 7, are placed in opposed grooves in the members 12, 18 and 23 to render their working surfaces liquid tight.

Also the spindle 16 is provided with an adjustment nut 30, and a spring 30 lies between said nut and member 23, to hold the spindle suitably adjusted, while also exerting tension centrally with respect to the assemblage of the valve elements.

By reference to Fig. 5 it willbe noted that the valve element 18 is provided with an arcuate slot or clearance 31, and an opposite, arcuate passage 32, of equal extent. The end walls 33 of the slot 31 are of convex form, and likewise the ends 34 of the pas sa e 32 have convex form. 7

here is also a transverse, alienate pas sage 36 in element 18 whichcommunicates respectively with the opposite ends of passa e 32.

,efore relating the functions of the slot 31 and assages 32, 36, it will be proper to descri e the passage in member 23 which co-acts therewith. Therefore, attentionis directed to Fig. 4 in which will appear the outer, arcuate passage 38 and the inner, op-

posed arcuate passage 39.

The assage 38, at its ends, communicates respectively with the ports 40, 41; and the passage 39, at its ends commuicates respectively with the parts 42, 43.

The port 40 is in fixed alignment with the port 10 in the cylinder side, and the port 41 is in alignment with the port 11, which is also located in the cylinder side.

The operation of the device will he rendered clearv b reference to Fig. 1, in which piston 2 is siown as making an outstroke, during which fluid is drawn into the cylinmenses wow ond half of the revolution of valve 18, when suction pull will be exerted at the forward face of'the piston, the inlet will also he through pipe A, but its path will follow' from port 11, through arcuate slot 31 and port 11; and at the same time fluid will be delivered from the other side of the piston, through .port 10, arcuate passage 32, transverse passage 36, arcuate passage 39, and out through pipe B.

In the foregoing operations it is assumed that the crank shaft, and consequently also the valve 18 are rotated in one direction.

But if the rotation of the crank shaft and valve 18 be reversed, thenthe inflow to the cylinder will be through. pipe B and the outflow from the cylinder through pipe A, as will be apparent.

Variations within the spirit and scope of my invention'are equally coni 'irehended by the foregoing disclosure:

1 claim:

1. A pump comprising a cylinder a reciprocatory piston therein, a peripherally exposed. disc-like valve revoluble against one side of the cylinder in a plane parallel with the cylinder axis, tcnsional means to press said valve against the cylinder, and passage ways controlled by said valve to communicate with the cylinder at opposite sides of the piston during the respective entire strokes thereof, respectively for alternate outflow and inflow purposes according to the direction oi piston movement.

2. A pump comprising a cylinder having ports at one side thereof respectively near its opposite ends, a reciprocatory. pistonin said cylinder, a valve revoluble against the ported side of said cylinder in a plane parallel with the cylinder axis, and having an arcuate slot to co-act alternately with said ports during the respective entire strokes of the piston. and outer, fixed closure means having a passage wayfor communication with said arcuatdslot.

A pump comprising a cylinder having arts at one side thereof, respectively near its opposite ends, a reciprocatory piston in said cylinder, 2. revolnble valve operable at the ported side of the cylinder and having;

; an arcuate slot, an arcuate passage opposed to the slot and a transverse pamage an EMT} mum-cation with the arcuate passage, said slot and arcuate passage respectively co acting alternately with the ports, and outer,

Eli

fixed closure means having passage-ways respectively for communication with said slot and ar'cuatepassage. 1

4. In a double acting pump, in combination, a cylinder having a piston reciprocable therein, one side of the cylinder having a plane surface and being provided with ports which communicate with the cylinder at opposite sides of the piston, a-shaft extended from the ported side of the cylinder, a disklike valve revoluble on said shaft, means for rotating said valve, and a fixed outer plate to enclose said valve, said outer plate having passage ways, and said valve having a slot and passage ways to alternately co-act between the respectivecylinder ports and passage ways of the outer plate.

5. In a double acting pump, in combination, a cylinder having a piston reciprocable therein, one side of'said cylinder having a plane surface and being provided with ports which communicate with the c linder at opposite sides of the piston, as aft extended .from the port side of the cylinder, a-diskalternately co-act between t opposite ends, a piston reciprocable therein,

and a revoluble valve co-opcrative under spring tension with the cylinder ports during the entire strokes. of the piston to supply and discharge the c linder simul-tane; ously, at opposite sides 0' the piston, in al ternation.

7.'In a pum of the character described, a cylinder having convertible inlet and exhaust ports, a piston reciprocating therein, a plate having substantially semicircular passages therein, one such passage being in communication with a source of fluid supply, the other passages being in coinn'mnication with a destination for the pumped fluid, a rotary valve plate fitted between said cylinder and said first mentioned plate and having arcuate channels therein adapted to alternately register with the inlet and eghaust ports of said cylinder and with the passages in said first named plate, means for rotating said valve plate together with the reciprocating movement of the piston, and yieldable means acting on said first'mentioned plate and on said valve plate for holding the same tightly together. Y

8. In a double acting reciprocatipg pump the combination of a cylinder having ports on opposite ends thereof, a piston within said cylinder, a. valve rotatably mounted upon a fixed stud and having a toothed periphery, said valve'being provided with an arcuate slot and with an urcuate recess op ositely disposed to said slot, and a va ve plate held against rotation relative to said valve, and provided with op ositely disposed arcuate passages having di erent radii and having openings formed in said plate communicating with said passages.

Signed at the borough of Manhattan, in thecity, county and State of New York, this 3rd day of October, 1922.

HANS E. DANSTRUP. 

